What's crazier than that huge figure, though, is how much Google offered to pay Groupon if the deal fell apart – a whopping $800 million.

Sources tell us Groupon turned down the deal because board members and executives felt like $800 million was not enough cash to recoup the value Groupon would lose if the merger were to fail anti-trust review.

All that said? Groupon probably would have accepted a $7.5 billion offer, sources say. Groupon is expected to IPO at a market cap above $10 billion sometime in the next week or two.